diff --git a/language-python-test/language-python-test.cabal b/language-python-test/language-python-test.cabal
index ea20cef..d8e417e 100644
--- a/language-python-test/language-python-test.cabal
+++ b/language-python-test/language-python-test.cabal
@@ -1,6 +1,6 @@
 name:                language-python-test
 version:             0.5.8
-cabal-version:       >= 1.6
+cabal-version:       >= 1.8
 synopsis:            testing code for the language-python library
 description:         testing code for the language-python library
 category:            Language
diff --git a/language-python/language-python.cabal b/language-python/language-python.cabal
index 2183d71..441d19b 100644
--- a/language-python/language-python.cabal
+++ b/language-python/language-python.cabal
@@ -1,6 +1,6 @@
 name:                language-python
 version:             0.5.8
-cabal-version:       >= 1.6
+cabal-version:       >= 1.8
 synopsis:            Parsing and pretty printing of Python code.
 description:         language-python is a Haskell library for lexical analysis, parsing
                      and pretty printing Python code. It supports versions 2.x and 3.x of Python.
@@ -23,11 +23,11 @@ Library
    hs-source-dirs: src
    ghc-options: -fwarn-incomplete-patterns -fwarn-unused-imports -fwarn-warnings-deprecations
    build-depends:
-      base == 4.*,
+      base >= 4.8 && < 5,
       containers >= 0.5 && < 0.7,
       pretty == 1.1.*,
       array >= 0.4 && < 0.6,
-      transformers >= 0.3 && < 0.6,
+      transformers >= 0.3 && < 0.7,
       monads-tf == 0.1.*,
       utf8-string >= 1 && < 2
    build-tools: happy, alex